Corporate consumerism may be a part of that, sure. Not saying it's good or bad, it just is.
As for lack of "real cultural diversity", well, people apparently don't care. I know that I don't. Cultural diversity is just random noise for me - it's cool to look at when you have lots of spare time / income, but when I'm making day-to-day decisions about what to wear, eat, or use for my tasks, I'm going to pick it based on factors like quality, cost-effectiveness and usefulness. Or in other words - it's fun to go to a ${insert culture} restaurant from time to time, but day-to-day, I'm gonna buy the white bread that's the same and universally available almost everywhere.
As for lack of "real cultural diversity", well, people apparently don't care. I know that I don't. Cultural diversity is just random noise for me - it's cool to look at when you have lots of spare time / income, but when I'm making day-to-day decisions about what to wear, eat, or use for my tasks, I'm going to pick it based on factors like quality, cost-effectiveness and usefulness. Or in other words - it's fun to go to a ${insert culture} restaurant from time to time, but day-to-day, I'm gonna buy the white bread that's the same and universally available almost everywhere.